Load handling apparatus



Aug. 15, 1933.

F. KINZBACH LOAD HANDLING APPARATUS Filed Sept. 19, 1930 Patented Aug. 15, 1933 insure-o STATES LOAD HANDLING APPARATUS Frank-Kinzbach, Houston, Texas Application September 19, 1930 Serial No; 483,045

- 8 Claims.

This invention relates to new and useful improvements in loading handling apparatus, and has more particular relation to what is'commonly known as a cathead.

1 An object of the invention is to provide a cable winding drummounted on a driving shaft and equipped with novel means for clutching the drum with the shaft, and for releasing said drum from the shaftand applying a novel type of brake to the drum to control the load being and handled. With the above and other objects in view, the invention has particular relation to certain novel features of construction, operation and arrangement of parts an example of which is given in this specification and illustrated inthe accompanying drawing wherein: n i p Figure 1 shows a vertical sectionalview. Figure 2 shows afragmentary plan view partly in section taken on the line 2- 2 of Figure l Figure 3 shows a fragmentary end view of the brake operating mechanism. 7

Ref rring now more particularly to the draw- 26 ing wherein'like numerals of "reference designate similar parts in each of the references the numeral 1 designates a power shaft which is suitably mounted in bearings in upright sup- 1 ports such as 2.

,3 0 Mounted on the shaft there is a cable winding drum 3 which runs on suitable antifriction bearings 4. This drum has the end flanges 5, 6 the latter of which is extended and formed into a clutch housing 7. A load handling cable B has one end permanently attached to the end flange 5 and this cable is adaptedto be spooled onto the drum and .to work over an overhead sheave inoperation. The shaft 1 is keyed to a clutch sleeve 9 whose inner end extends into .40 the housing 7 and threaded onto said sleeve there is an annular outer end plate 10 which forms the outer end of andencloses the housing. "Slidable on the sleeve 9 there isan enternally grooved ring 11, the groove of which ret vceives the fingers 12 of the bifurcated end-of the clutch shift lever 13. The lower end of this lever is permanently attached to a stub shaft 14 which rotates in the bearing 15 on the supporting floor and fixed to said shaft there is a foot pedal 16 through which the lever 13 may be manipulated.

Within the housing '7 there is a conventional disc clutch 1'1 through which the drum may be clutched with and declutched from the shaft 1.

P? Attached to the ring 11 are the inwardly extending plunger's as 18, whose inner ends have outwardly beveled bearing faces 19 which work against correspondingly beveled faces 20 of the arms 21 which are fixed on the short transverse shafts as 22 in theclutch sleeve 9 and these shafts 22 have the outwardly extending arms 23 fixed thereto which bear against the inner clutch disc 24.

When thefoot pedal 16 is depressed the plungers 18 will be forced inwardly forcing the arms 5 21 inwardly and clamping the arms 23 against said inner clutch plate and thus clutching the drum 3 withthe shaft 1.

The drum is extended beyond the end flange 5 and is outwardly turned forming the brake flange 25.

Suitably bolted to the adjacent sup port 2, there is a supporting plate 26 and bolted to it there is an inwardly extended brake housing 27 bolted to theinner end of which there is the annular plate 28 which embraces the flange 25 on the inner side andbetween the flange 25 and the plate 28 there is a suitable brake lining 29. Working against the outer side of the flange 25 there is an annular thrust plate 30 which is splined to the housing 2'1 by the splines so 31. A plurality of screw shafts 32 are threaded through the supporting plate 26 and have the spur gears 33 fixed thereon; The inner ends of these shafts work in aligned sockets as 34 in said thrustplate. A master ring gear 35 works around and is in mesh with the gears 33. When the master gear is rotated in one direction the shafts 32 will be correspondingly rotated and forced inwardly, thus forcing the thrust plate 30 against the drum flange 25 and clamping said flange between said thrust plate and the braking surface 29, thus braking the drum. The master gear has a brake lever 36 attached thereto through which the brake may be manually set and controlled so that when aload is suspended from the cable Sitmay be held suspended by the operator and gradually lowered in place by gradually releasing the brake.

Mounted on a suitable support 37there is a bell crank one a1'n138 of which is connected to the clutch shaft lever through the link 39 and whose other arm 40 is bifurcated and embraces the brake lever 41 extending outwardly from said master gear. When the clutch is engaged through the manipulation of the foot pedal 16,

as hereinabove explained the brake lever 41 will be manipulated through said link and bell crank and when so actuated the brake lever 41 will release the brake so that the drum will be free to rotate. When the drum is declutched from said shaft by releasing the clutch lever 16, the brake may be then manually applied as hereinbefore explained through the brake lever 36 and the load onthe cable 8 thus manually controlled. In actual use the mechanism may be housed in and protected so as not to be liable to injure the workmen and the cable 8 will be manipulated entirely by the drum 3 so that the workmen will not be liable to become entangled in and injured by the cable. At the present time in the use of cat heads the load handling cable is usually wound about the cat head with one end thereof passing over an overhead sheave and being attached to the load and the other end thereof being handled by a workman. When used in this manner when the load is to be lifted, the workman pulls on the cable to give it the required friction about the drum and when the load is landed at the desired place the cable is released so that the drum may rotate idly, but this is a dangerous character of work and the workmen are of ten injured thereby and with the type of cat head herein above described this danger to the workman is entirely obviated.

Thedrawing and description disclose what is now considered to be a preferred form of the invention by way of illustration only, while the broad principle of the invention will be defined by the appended claims.

What I claim is:

1. In load handling apparatus having a power shaft, and a drum loosely mounted thereon; an annular brake flange on the drum, a support adjacent said flange, brake mechanism embracing the flange and including a brake surface on one side of the flange and a thrust plate on the other side of the flange, screw shafts threaded through said support, a pinion on each screw shaft, a ring gear in mesh with said pinions and means for operating the ring gear.

2. In load handling apparatus having a power shaft, and a drum loosely mounted thereon; annular brake flange on the drum, a supporting plate adjacent said brake flange, screwshafts threaded through said supporting plate, brake means embracing said brake flange and having a brake surface on'one side of the flange and a thrust plate at the other side of the flange against which the screw shafts bear, a pinion on each screw shaft, a master gear in mesh with said pinions, and operative connections for operating the master gear.

3. In load handling apparatus having a power shaft, and a drum loosely mounted thereon; an annular brake flange on the drum, a supporting plate adjacent said brake flange, screw shafts threaded through said supporting plate, brake meansembracing said brake flange and having a brake surface on one side of the flange and a thrust plate at the other side of the flange against which the screw shafts bear, a pinion on each screw shaft, a master gear in mesh with each pinion, and means for manually manipulatannular brake flange thereon, a brake housing having an annular brake surface on one side of said brake flange, an annular thrust plate on the other side of the brake flange, jack screws threaded through a supporting plate and whose inner ends bear against said thrust plate, a master ring gear and pinions within said ring gear and in mesh therewith and fixed on said jack screws and means for rotating the ring gear whereby the brake may be set or released.

5. The combination with a rotatable member having a brake flange, of relatively fixed and movable annular plates one on each side of said flange, an anchor, a plurality of screw shafts threaded through said anchor, and operable against said movable plate, a master gear geared to said shafts and means for rotating said master gear whereby said brake flange may be clamped between said relatively movable plates,

or released. v

6. The combination with a rotatable member having a brake flange, of relatively fixed and movable annular plates one on each side of said flange, an anchor, a plurality of screw shafts threaded through said anchor, and operable against saidmovable'pl'ate, a master gear geared to said shafts and means for rotating said master gear whereby said brake flange may be clamped between said relatively movable plates,

or released, and means for preventing the rotatlon of said plates. 4

"7. In load handling apparatus having power delivery means and a drum loosely mounted thereon; an outwardly extending brake flange the drum, a support adjacent said brake flange, shafts having threaded connections with said support, brake means embracing'said brake flange and including a brake surface on one side of the flange and a thrust plate at the other side a of the flange against which the screw shafts are operative, means on said screw shafts for turning the same, an annularinember in operative connection with said shaft turning means for turning the same, whereby said shafts may". be operated against said thrust plate to force the same into frictional engagement with, and to release the same from said brake flange.

8. In loading apparatus having power delivery means and a drum loosely mounted'thereon; an outwardly extending brake'flange on the drum, supporting means associated with said brake flange, shafts having threaded" connections with said supporting means, brake means embracing said brake flange and having a brake surface on one side of the flange and: thrust plate on the other side of the flange against which the screw shafts are operated, said thrust plate having a friction surface, means on each shaft for rotating the same, an annular member cperatively connected with said shaft rotating means for actuating the same and means for turning said annular member to effect the rotation of said shafts whereby the friction surface of said thrust plate maybe forced into frictional engagement with or released from said brake flange.

FRANK KINZBACHQ 

